This document defines a profile that is a superset of the connection
to IPv6 cellular networks defined in the IPv6 for Third Generation
Partnership Project (3GPP) Cellular Hosts document. This document
defines a profile that is a superset of the connections to IPv6
cellular networks defined in "IPv6 for Third Generation Partnership
Project (3GPP) Cellular Hosts" (RFC 7066).
Both mobile hosts and mobile devices with the capability to share
their 3GPP mobile connectivity are in scope.

It should say:

This document defines a profile that is a superset of the connection
to IPv6 cellular networks defined in "IPv6 for Third Generation
Partnership Project (3GPP) Cellular Hosts" (RFC 7066). This document
defines an IPv6 profile that a number of operators recommend in order
to connect 3GPP mobile devices to an IPv6-only or dual-stack wireless
network (including a 3GPP cellular network) with a special focus on
IPv4 service continuity features.
Both mobile hosts and mobile devices with the capability to share
their 3GPP mobile connectivity are in scope.